Sealing closure for bottles and containers



Dec. 7 1926. 1,609,562

H. L. LoNsDALE er AL SEALING CLOSURE FOR BOTTLES AND CONTAINERS Filed April 19, 1923 linaddition to use in the 'small metallic caps Patented Dec. 7, 1926.

UNITED ASTATES l l 1,609,562 PATENT oFElcE.

HERBERT L. LoNsnALE AND NOBLE E. sNYDErn-or cHIcAGo, ILLINoIs.

SEALING CLOSURE FOR. BOTTLES .AND CONTAINES.

Application mea April 1s, 192s. vserial No. senos?.

This invention relates to improvements inK sealing disks for containers or receptacles, and refers more particularly to the thin resilient disksused in connection with metallic closures which are formed in the shape` of caps on the tops of bottles, jars.

or other containers, for the 1n0r the containers. l

ig.I 1 'isa vlew 'of one of the seallng purpose of clos.-

disks having the sealing lm over the entire disk and broken away' in the drawings' to show the manner in which it covers the disk.

Fig. 2 is a sectional view through the disk and metallic cap to show the-positioning of the disk in the cap. p

Fig. 3 is a .modified form of construction i`n which the disk-has the sealing film only over the lover surface. of the disk, or that portion whlch is in contact with the contents of the container,

The metallic caps. having aliner of resilient material, have been adopted as one of the most satisfactory and inexpensive sealing elements which have been devised for sealing containers. A cap of this character not only furnishes a perfect gas and airtight seal to prevent thecontents of the bottle from deteriorating, but is also un-' alected byv conditions involved in the capping and sterilization of the bottle and its contents.

It is a well known 'fact that`cork is the most satisfactory material for use in the thin sealing liners.

In making the .thin sealing elements for the metallic caps, cork of dilerent characters is used. In some cases the nativecork is sliced or cut into thin layers or sheets and punched into rings .or disks to fit into thev metal caps'. This however, vis an expensive procedure and usually the waste cork left after producing bottle Stoppers is ground up into a relatively commmuted form and this is combined with a binder such as glue or other adhesive insoluble sizing which serves to unite the particles when the com.

minuted or ground cork is pressed into iorms from which the caps are/cut., These forms may be either sheets or c lindric'al rods subsequently punched or s iced into thin caps adaptable to be inserted into the tops of the metallic caps which are applied upon the containers.

In this connection it will be noted that for bottles, the sealing caps may also be used for sealing the tops of containers which have a larger mouth or opening such as jars which are equipped with screw caps or patented cap' fastenin s. Resilient stealing disks suchas hereina ter described are as adaptable to such use s as they are to the sealing of bottles orliquid. In fact, the seal may be used in" connection with any t e of liquid, lsolid or semi-solid substance,

i ealing caps of the character described, are now well known in the art", and it isthe improvement of the sealingjportion of thse caps that is the salient feature of the present invention. It is a well knownv fact that cer;

tain products which are sealed in this manner, attack the cork, producing discoloration and deterioration of the contents, and also causing the cork to lose its sealing properties.` To prevent this, numerous attempts have been made to prevent the contents from coming in contact withthe sealing material.

This has been accomplishedby aiiixing a disk of paraiiined or oiled paper, tinfoil or other relatively' inert substances applied in the form of a thin sheet tothe face of the sealing disk." Such material is also applied to certain fibrous materialswhen the latter are used as sealing substances. A material applied to,the cork inA this manner, however,

is objectionable for the reason that 'it has not the resilient properties of the cork, and

`consequently when the closures are aiixed will conform with anydeformity caused by the pressure of a cap'upon the container top.

In its broader aspects this'substance may be any inert liquid that will not ,strikeinto the cork and saturate the same,'but)may be applied to produce a thin film or skin upon the surface of the cork ex osed to .the action of the sealed products. e have this effect by treating the cork sealing-disks first, with a glue size which iills the surface pores of the cork -and prevents the liriseed oil varnish subsequently applied' from striking into the body of the cork. After the produced application of the linseed oil varnish, the cork is heated to temperatures regulated to satisfactorily oxidize the linseedroil varnish upon tlie cork Vsurface and produce a uniform, impervious and resilient skin or film. Y

The corkdisks made in this manner can be manufactured cheaper than when a disk of material is aflixed to each of the caps, and besides the cost of manufacture, the inert lilm will producera more satisfactory insulating material due to the fact that it will more readily coliform the deformities produced b v compression upon the seal.

ln place of a linseed oil varnish, numerous types of coating materials may be used which will give a satisfactory inert coating ma terial. The preferable form, namely, the oxidized linseed oil varnish, is disclosed as beure1r the most satisfactory under conditions lo which the sealing caps are subjected, but it is appreciated that this substance may be replaced with other liquid coatings to give as satisfactory results. L

Referring in detail to the drawing, the. cork disk 1 is coated With an inert film of compressible material 2. This coated cork disk may be thenplaced Within the upper portion of the metallic sealing cap 3. The inert film of impervious stretchy material suc-li as oxidized varnish, may entirely surround the cork disk, or one side only may be coated.

In its broader aspects, the invention lies in the coating of the cork surface with a film of inert substance which Will produce a resilient skin or coating.

lVe claim as our invention:

l. The combination with a metallic sealing;r closure for containers. of a sealing disk positioned therein, comprising a cork body portion coated with a sizingr substance and a stretchable impervious oxidized film.

2. The combination with a metallic seal* ingr closure for containers, of a sealing disk positioned therein, comprising a body portion of liexible stretchable material having the surface adapted to be in Contact with the contents of the-container, coated with a sizing' substance and a compressible inert oxidized film.

HERBERT L. LONSDALE. NOBLE E. SNYDER. 

